Add magics to import sorting tests for Jupyter Notebook

Author: dhruvmanila

crates/ruff/resources/test/fixtures/jupyter/isort.ipynb

@@ -25,6 +25,23 @@
     "def foo():\n",
     "    pass"
    ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "16214f6f-bb32-4594-81be-79fb27c6ec92",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "from pathlib import Path\n",
+    "import sys\n",
+    "\n",
+    "%matplotlib \\\n",
+    "    --inline\n",
+    "\n",
+    "import math\n",
+    "import abc"
+   ]
   }
  ],
  "metadata": {

crates/ruff/resources/test/fixtures/jupyter/isort_expected.ipynb

@@ -27,6 +27,23 @@
     "def foo():\n",
     "    pass"
    ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "6d6c55c6-4a34-4662-914b-4ee11c9c24a5",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "import sys\n",
+    "from pathlib import Path\n",
+    "\n",
+    "%matplotlib \\\n",
+    "    --inline\n",
+    "\n",
+    "import abc\n",
+    "import math"
+   ]
   }
  ],
  "metadata": {

crates/ruff/src/jupyter/snapshots/ruff__jupyter__notebook__tests__import_sorting.snap

@@ -47,4 +47,45 @@ isort.ipynb:cell 2:1:1: I001 [*] Import block is un-sorted or un-formatted
 7 9 | def foo():
 8 10 |     pass
 
+isort.ipynb:cell 2:6:1: I001 [*] Import block is un-sorted or un-formatted
+   |
+ 4 |   def foo():
+ 5 |       pass
+ 6 | / from pathlib import Path
+ 7 | | import sys
+ 8 | | 
+ 9 | | %matplotlib \
+   | |_^ I001
+10 |       --inline
+   |
+   = help: Organize imports
+
+ℹ Fix
+6  6  | # Newline should be added here
+7  7  | def foo():
+8  8  |     pass
+   9  |+import sys
+9  10 | from pathlib import Path
+10    |-import sys
+11 11 | 
+12 12 | %matplotlib \
+13 13 |     --inline
+
+isort.ipynb:cell 3:5:1: I001 [*] Import block is un-sorted or un-formatted
+  |
+3 |       --inline
+4 |   
+5 | / import math
+6 | | import abc
+  |
+  = help: Organize imports
+
+ℹ Fix
+12 12 | %matplotlib \
+13 13 |     --inline
+14 14 | 
+   15 |+import abc
+15 16 | import math
+16    |-import abc
+